PGP does work with bootcamp, PGP requires that there be an osx partition and a windows partition, this is because windows version of PGP desktop doesn't support EFI and has been modified to support bootcamp on macs.
If i remember correctly, apple doesn't let bootcamp to be installed without osx and it has to be on the same drive as osx. I'm sure there are work-arounds.. which might explain why PGP added that comment about partitions.
PGP needs to be installed in a specific order so that both the osx partition and the windows partition are encrypted.
(assuming bootcamp and windows is already installed)
- install PGP on osx, reboot do not encrypt.
- boot up to windows, install pgp, reboot do not encrypt
- boot up osx, encrypt the disk.
Doing this will encrypt the whole harddrive, creating a pre-boot login screen for both osx and windows.
http://www.symantec.com/business/support/index?page=content&id=TECH149590